Bolster for spinning-spindles



(No ModeL) O. H. CHAPMAN.

BOLSTER FOR SPINNING SPINDLES.

Patented Oct. 6, 1885.

UNITED STATES PATENT OFFICE.

CHARLES H. CHAPMAN, OF GROTON, ASSIGNOR TO THE EUREKA SPINDLE COMPANY,OF AYER, MASSACHUSETTS.

BOLSTER FOR SPINNING-SPINDLES.

SPECIFICATION forming part of Letters Patent No. 327,863, dated October6, 1885. Application filed May 18, 1885. Serial No. 165,864. (No model.\

To aZZ whom zit may concern.-

Be it known that I, GHARLEs H. CHAPMAN, a citizen of the United States,residing at Groton, in the county of Middlesex and State ofMassachusetts, have invented a new and useful Improvement in Bolstersfor Spinning- Spindles; and I do hereby declare the following to be afull, clear, and exact description thereof, reference being had to theaccompanying drawings.

My invention relates to that class of bolsters in which all the bearingsfor the spindle are located within abolster-case; and it has for itsobject to secure a greater steadiness of the spindle when running athigh speed, and to prevent the spindle from being drawn from the centerof the ring by the band-pull. To accomplish these results I provide afixed step or journal bearing for the foot of the spindle, composed ofany non-metallic and yielding substance-such as leather, wood, orcorkand located within a bolster-case of usual construction. Immediatelyabove and resting upon such step-bearing I place ametallicbolster-bearing or bolster-tube closely fitted within thebolstercase and extending upward around the spindle to a point within asleevewhirl about on a line with the plane of the band-pull, therebygiving the spindle a positive support against the band-pull andpreventing its being drawn out of the center of the ring. Above suchbolster-bearing, and above the plane of the band-pull, I surround thespindle with an auxiliary bearing of a like nonmetallic material adaptedto receive the spindle and afford it lateral support in case ofvibration. These alternate sections of metallic and non -metallicsupports are firmly compressed together and held within the bolstercaseby means of a screw cap or plug attached to the upper end of thebolster-case,andforming,when applied, a part or extension of such case.By this construction the intermediate metallic bolstenbearin g receivesthe entire lateral pressure of the spindle due to the bandtension, andaffords it ample support when running steadily and withoutvibration,while the non-metallic step-bearing below and auxiliarybearing above operate to re enforce the bolster-bearing'and give thespindle additional supportin case vibration occurs. This operation ismore clearly understood when it is known that spindles of this classgyrate when unequally loaded about a center of motion which is locatedwithin the plane of the band-pull. Spindles of this class as heretoforeconstructed, when designed to embody a self-centering capacity and runwithout gyration under an unequally-distributed bobbinload, have beenformed with the bolster and step bearings integral, the same beingfitted loosely within the the bolster-case to allow lateral movement,and surrounded therein by a yielding cushion. I have discovered,however, that better and more permanent results are obtained if thebolster-bearing is closely fitted within the bolster-case and the footof the spindle extended down through and below the bolster-bearinginto afixed step of non-metallic material, such material being also applied tothe spindle above the metallic bolster-bearing to reenforce the same andcushion the spindle in case of vibration, as before described. By thusplacing the yielding material above and below the metallicbolster-bearing, instead of around it, greater steadiness of rotation issecured, and the spindle is not drawn from the center of the ring by theband-tension, as is the case with a yielding bearing.

Referring to the accompanying drawings, Figure l is a sectionalelevation showing the spindle with its sleeve-whirl, the bolster-case,and the several sections of the compound bolster-bearing allintheir-working position; Fig. 2, a sectional elevation of the screw-capand upper auxiliary bearing removed; Fig. 3, a plan of the metallicbolster-bearing.

In Fig. 1 it will be seen that the bolster-case B is of usualconstruction. At the bottom of the caseis placed the fixed step bearing0, preferably made from leather, and having the form of an annular disk.Resting upon the nonmetallic step-bearing c is the metallicbolsterbearin g d, closely fitted within the bolster-case, and affordingthe spindle A a direct lateral support upward to a point about on a linewith the band-groove of the whirl. Above the plane of the band-groovethe internal diameter of the bolster-bearing is enlarged at b andloosely encircles the spindle upward to apoint above the top of thebolster-case. This enlarged extension serves as a receptacle for surplusoil carried up by the rotation of the spindle, and being extended abovethe top of the bolster-case, it receives the non-metallic auxiliarybearing c,which is also preferably made from leather. This bearing islocated Within the retaining-cap or screw-cap f,as shown,and when thecap is screwed down to place the bearing 0 is thereby brought down uponthe head of the bolster-bearing d, and the several sections 0, d, and eare pressed firmly together and held in place by such screw-cap.

The central opening in the head of the cap is somewhat greater indiameter than that through the bearing 6, as shown, in order that thespindle may always come in contact with the bearing rather than with thecap. The external diameter of the bolster-bearing dis reduced,as shownat h, in order to provide more ample space for surplus oil, the educts ss s and groove t affording the necessary communication between theseveral parts.

An important feature of this form of construction is found in the factthat the spindle does not require to be fitted as closely in thebolster-bearing as heretofore, and hence runs with less power, and willcontinue to run stead- 11y after the bolster-bearing becomes worn;

also, that any-shrinkage or wear in the nonmetallic bearing may bequickly corrected by screwing down the cap and compressing such bearingsas required.

Having thus described my inventiomwhat I claim is 1. A spindle, itssleeve-whirl, and bolstercase, combined with a compound or sectionalbearing consisting of alower non-metallicsection adapted to receive thefoot of the spindle, an intermediate metallic section adapted to supportthe spindle against the band-pull,and an upper auxiliary non-metallicsection adapted to afford additional support to the spindle and steadyit against vibration, as described.

2. The bolster-case B, provided with the nonmetallic step-bearing 0,located at the bottom of the case,and with the metallic bolster-bearingresting upon the step bearing and extending above the neck of thebolster-case, combined with the retaining-cap f, provided with theauxiliary non-metallic bearing 6, and adapted to sleeve the neck of thebolster-case and hold such auxiliary bearing firmly against the metallicbolster-bearing, as set forth.

' CHARLES H. CHAPMAN. Inpresence of J; R. GRAY, WVM. BROWN.

